这个标准涵盖塑料美国锥管螺纹(NPT)的尺寸和计量方法，用于泄漏密封连接，现在已在所有有关塑料管道产品的ASTM标准中引用。
The standard covers dimensions and gaging of plastic tapered National Pipe Threads (NPT) for leak-tight joints, and it is now referenced in all ASTM Standards for plastic piping products.
介绍了常见的用于紧固联接英寸制螺纹和用于管道连接英寸制螺纹的牙形、配合和标识，以及管螺纹的密封特点。
The tooth shape, fit and mark of clamping connection and pipe connection inch threads commonly used are introduced and their seal features.
传统的套管接头不能满足连接与密封要求，并设计出了一种新型的膨胀连接螺纹结构。
Conventional connector for casing string can't meet the demand of seal and connection in solid expandable tubular and presented a new thread structure for an expandable casing connector.
过程连接必须和橡胶外壳密封，不是螺纹！
The process connections must seal tightly to the plastic housing but not the thread!
组件提供多种连接方式备选。适配器采用O形环密封，易于连接到螺纹阀门上。完整的组件包括。
Kit allows multiple connection options. Adapters use O-ring seals for easy connection to threaded valve. Complete Kit includes.
无螺纹连接固定，无摆动旋转连接，双层密封，独特密封保护工艺，防止水中杂质进入密封层。
No Screw Thread Connect Fix, No Sway Rotate Connect, Two Layer Seal, Distinctive Seal Protect Craft, Prevent Impurity Enter The Seal Layer.
无螺纹连接固定，无摆动旋转连接，双层密封，独特密封保护工艺，防止水中杂质进入密封层。
No Screw Thread Connect Fix, No Sway Rotate Connect, Two Layer Seal, Distinctive Seal Protect Craft, Prevent Impurity Enter The Seal Layer.
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